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onsemi 1N4750ARL
- Part No.:
- 1N4750ARL
- Manufacturer:
- onsemi
- Category:
- Single Zener Diodes
- Package:
- DO-204AL, DO-41, Axial
- Datasheet:
-
1N4750ARL.pdf
- Description:
- DIODE ZENER 27V 1W DO41
- Quantity:
- Payment:
- Shipping:
Inventory:27,000
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Product details
Overview
1N4750ARL from ON Semiconductor is a 1 W, 27 V ±5% Zener voltage regulator diode in DO-41 (DO-204AL) hermetically sealed glass package, rated for –65°C to +200°C operation, with 9.5 Ω maximum Zener impedance at 9.5 mA test current and 0.25 µA max leakage at 20.6 V reverse bias. It delivers stable reference voltage in power supply feedback loops and overvoltage protection circuits.
For engineers reviewing the 1N4750ARL datasheet, pinout, applications, or equivalent options, this page provides verified electrical parameters, thermal derating behavior, JEDEC-compliant Zener impedance derivation, polarity marking details, and real-world surge capability per Figure 5 of ON Semiconductor's General Data – DO-41 Glass.
Technical Context
The 1N4750ARL operates as a silicon-oxide passivated junction Zener diode optimized for precision voltage regulation under steady-state DC conditions. Its double-slug, metallurgically bonded construction ensures mechanical robustness and thermal stability, while the hermetically sealed glass case provides environmental immunity across industrial and automotive ambient ranges.
Zener voltage is guaranteed at 27 V nominal (25.7–28.4 V range) when measured at 90 seconds with lead temperature held at 30°C ±1°C, 3/8″ from the body. Dynamic impedance (ZZT = 9.5 Ω) is derived using 60 Hz AC current equal to 10% of IZT (9.5 mA), per JEDEC methodology.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Zener Voltage (VZ) | 27 V nominal (25.7–28.4 V, ±5%), defines stable regulation point for feedback networks |
| Test Current (IZT) | 9.5 mA - standardized operating point for VZ and ZZT measurement |
| Zener Impedance (ZZT) | 9.5 Ω max at IZT - low dynamic resistance enables tight regulation under load transients |
| Max Power Dissipation (PD) | 1.0 W @ TL ≤ 50°C - requires thermal management above 50°C (6.67 mW/°C derating) |
| Leakage Current (IR) | 0.25 µA max at 20.6 V - ensures minimal error current in high-impedance reference paths |
| Surge Current (IR) | 170 mA non-repetitive (1/120 s pulse) - supports transient overvoltage clamping without degradation |
| Operating Temperature | –65°C to +200°C - qualified for extreme-environment applications including under-hood automotive |
Pinout & Package
Package: DO-41 (DO-204AL), axial-lead, hermetically sealed glass case with cathode indicated by a single band. Double-slug construction and metallurgical bonding ensure mechanical integrity and thermal reliability.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Forward conduction terminal / Zener cathode reference ground | Connected to circuit ground or lower-potential node in shunt regulation configuration |
| Cathode | Zener breakdown terminal / voltage reference output | Provides regulated 27 V output when reverse-biased; marked with polarity band |
Key Features
| Feature | Design Value |
|---|---|
| Oxide-passivated silicon junction | Enables stable long-term VZ drift performance and low noise in precision references |
| ESD rating Class 3 (>16 kV HBM) | Supports handling and assembly in standard production environments without special ESD controls |
| Hermetic glass sealing | Prevents moisture ingress and corrosion, ensuring reliability in humid or chemically aggressive environments |
| Double-slug mechanical construction | Improves thermal transfer from die to leads, supporting higher sustained power dissipation |
| JEDEC-standardized test conditions | Ensures consistent VZ, ZZT, and IR values across manufacturing lots and suppliers |
Applications
| Switching Power Supply Feedback | Overvoltage Protection Clamp |
|---|---|
Use Scenario: Used in the optocoupler feedback path of isolated DC-DC converters to regulate output voltage. IC Role / Device Role / Timing Role: Shunt voltage reference providing precise 27 V threshold to control primary-side PWM duty cycle. Use Value: Tight ±5% VZ tolerance and low 9.5 Ω ZZT minimize output voltage drift across line/load/temperature. | Use Scenario: Placed across sensitive IC inputs to clamp transient spikes exceeding 27 V. IC Role / Device Role / Timing Role: Passive crowbar element that conducts during overvoltage events to limit voltage stress. Use Value: 170 mA non-repetitive surge rating allows absorption of short-duration transients without failure. |
| Industrial Sensor Reference | Automotive Body Control Module |
Use Scenario: Supplies stable 27 V reference to analog front-end circuitry in pressure or temperature sensors. IC Role / Device Role / Timing Role: Precision voltage source for ADC biasing and signal conditioning stages. Use Value: –65°C to +200°C operating range and oxide-passivated junction ensure accuracy over full vehicle lifetime. | Use Scenario: Regulates auxiliary rail in BCM microcontroller power domains exposed to engine bay temperatures. IC Role / Device Role / Timing Role: Primary shunt regulator maintaining 27 V for CAN transceiver bias and LED driver logic. Use Value: Hermetic glass package withstands under-hood humidity and thermal cycling without parameter shift. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Zener voltage regulation applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| 1N4750A | Same electrical specs and DO-41 package; differs only in packaging format (bulk vs. tape & reel) | No functional difference; suitable for manual prototyping or low-volume hand-soldering | Select 1N4750A for lab evaluation; 1N4750ARL preferred for automated SMT placement |
| BZX55C27 | 27 V ±5%, 500 mW rating, DO-35 package - lower power, smaller footprint, higher ZZT (28 Ω) | Not suitable for 1 W continuous dissipation; limited to low-power biasing or signal-level clamping | Choose BZX55C27 only where space constraints prohibit DO-41 or power demand is <500 mW |
Compared with 1N4750A, the 1N4750ARL offers identical regulation performance with tape-and-reel logistics support; versus BZX55C27, it delivers 2× power handling and 3× lower Zener impedance, enabling robust regulation in high-current feedback paths.
Availability
1N4750ARL is available at Aetrix Electronics and suitable for switching power supplies, overvoltage protection circuits, and industrial sensor reference designs requiring stable component supply and long-term manufacturability.
Supply support for 1N4750ARL includes scheduled delivery planning, volume procurement assistance, BOM continuity management, traceable sourcing, and lifecycle availability coordination for OEM customers, industrial embedded developers, connected-device designers, and electronics production programs.
Manufacturer
ON Semiconductor is a global semiconductor manufacturer specializing in energy-efficient power management, analog, and discrete devices for automotive, industrial, and communications markets.
The 1N4750ARL belongs to the 1N4728A Series - a family of 1 W Zener regulators engineered for high-reliability voltage reference and clamping in harsh-environment applications.
FAQ
What is the Zener voltage tolerance for the 1N4750ARL?
The 1N4750ARL has a nominal Zener voltage of 27 V with a standard tolerance of ±5%, resulting in a guaranteed range of 25.7 V to 28.4 V at IZT = 9.5 mA and TL = 30°C ±1°C. This tolerance is defined per JEDEC standards and applies to all units in the series unless tighter tolerances are specially ordered.
How does thermal derating affect the 1N4750ARL's power dissipation?
The 1N4750ARL is rated for 1.0 W maximum steady-state power dissipation at lead temperature (TL) ≤ 50°C. Above 50°C, power must be linearly derated at 6.67 mW/°C. For example, at TL = 75°C, allowable PD drops to 833 mW. Derating is based on lead-to-ambient thermal resistance and mounting method.
What is the meaning of "RL" in the 1N4750ARL part number?
The "RL" suffix in 1N4750ARL indicates tape-and-reel packaging: 6000 units per reel in axial-lead configuration (Case 59). This format supports automated pick-and-place assembly. The base part 1N4750A denotes the same electrical device in bulk packaging (2000 units/box).
Can the 1N4750ARL be used in automotive under-hood applications?
Yes, the 1N4750ARL is qualified for –65°C to +200°C operating and storage temperature range, and its hermetically sealed glass package resists humidity and chemical exposure. These characteristics make it suitable for under-hood automotive applications such as body control modules and engine management subsystems where thermal and environmental stress is high.
What is the maximum non-repetitive surge current rating for the 1N4750ARL?
The 1N4750ARL has a maximum non-repetitive reverse surge current (IR) of 170 mA for a 1/120 second (8.3 ms) pulse duration, as specified in the ON Semiconductor datasheet. This rating reflects worst-case capability per Figure 5 of the General Data – DO-41 Glass and supports transient overvoltage clamping without permanent degradation.
1N4750ARL Specifications
- Product attributes
- Attribute value
- Manufacturer:
- onsemi
- Series:
- -
- Package/Case:
- DO-204AL, DO-41, Axial
- Packaging:
- Bulk
- Product Status:
- Active
- Voltage - Zener (Nom) (Vz):
- 27 V
- Tolerance:
- ±5%
- Power - Max:
- 1 W
- Impedance (Max) (Zzt):
- 35 Ohms
- Current - Reverse Leakage @ Vr:
- 5 µA @ 20.6 V
- Voltage - Forward (Vf) (Max) @ If:
- -
- Operating Temperature:
- -65°C ~ 200°C (TJ)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Through Hole
- Supplier Device Package:
- DO-41
1N4750ARL FAQ
1.How can I place an order for 1N4750ARL through Aetrix?
Please submit a Request for Quotation (RFQ) for 1N4750ARL on Aetrix. Our sales agent will provide a competitive quotation and guide you through the order confirmation once you accept the terms.
2.Are the price and stock information for 1N4750ARL reliable?
The price and inventory of 1N4750ARL are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 1N4750ARL is usually 5 days.
3.What payment methods are accepted for 1N4750ARL?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 1N4750ARL transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 1N4750ARL?
1N4750ARL orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 1N4750ARL order is processed, you will receive an email with the shipment details and tracking number.
Note: Tracking information may take up to 24 hours to appear. Express delivery typically takes 3–5 business days.
5.How can I obtain technical support or documentation for 1N4750ARL?
For technical support, including 1N4750ARL datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 1N4750ARL requirements.
6.How does Aetrix verify that 1N4750ARL is sourced from the original manufacturer or authorized distributors?
All 1N4750ARL products on Aetrix are procured from qualified distributors and authorized channels. Our dedicated quality assurance team conducts strict verification, including traceability checks and, if necessary, third-party testing. This ensures that 1N4750ARL meets industry standards.
7.What is the process for return or replacement of 1N4750ARL?
All 1N4750ARL units undergo pre-shipment inspection (PSI). If there is an issue with 1N4750ARL, returns or replacements are accepted under the following conditions:
1.Quantity discrepancies, incorrect items, or visible external defects (such as breakage or corrosion), acknowledged by Aetrix.
2.The issue is reported within 90 days of delivery.
3.The 1N4750ARL part is unused and in its original packaging.
Return procedure for 1N4750ARL:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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